Finally, it is possible to reduce the five periods to two very long-term periods: one cooling/flat and one warming. This can be accomplished if one strictly uses the change of the slope of the linear trend from negative to positive at a specific point over the entire length of time since...
Temperature records from all four MRS sites and the additional high plains site of Longmont (1509 m) are analyzed for the period 1952–1997, after extraction of much extra data from the original thermograph charts. The records are adjusted for instrumental changes where necessary and all four ...
ORDER The Great Ice Age: Climate Change and Life Introduction to Ice Ages & Climate Change: the Northern Hemisphere has had a dozen major glaciations in the last 1 million years Land Environments around the Globe: detailed maps and text show changes in forests, deserts, tundra, more, during...
Earth is getting slightly warmer year by year. It's not really warming up noticeably—at least not in the short term. In fact, since 1900, the whole planet has warmed up only by around 1.1 degrees Celsius.[1]By the end of the 21st century, however, global warming is likely to...
It is possible Otzi was fleeing from political persecution, but he learned, as we have, that there is no safe altitude. [1]“Historical Evidence and Climatic Implications of a Shift in the Boreal Forest Tundra Transition in Central Canada”,Climatic Change1986, Vol. 7, pp. 218-229...
In 2001 the IPCC came out with itsThird Assessment Reportof world climate. The Hockey Stick graph had totally taken over the narrative, appearing as the lead graph in the Summary for Policy Makers and at multiple other places throughout the Report. The abolishment of the MWP was never menti...
(a, top graph) TI (°C-days) through time for the three study sites. The dotted lines represent the thawing index normals (1979 to 2000; http://climate.weather.gc.ca/historical_data; Everett, 1968) for each site. Time on the x axes is in calendar years. (bottom graph) Maximum tha...
As illustrated in the accompanying graph, Canada faces two starkly different pathways moving forward. Based on a 1986-2005 reference period, the average annual temperature is projected to increase by: 1.5°C between 2031 and 2050, and by 1.8°C between 2051 and 2100 under alow greenhouse gas ...
Mountain Research Station (MRS) at the University of Colorado cover a range of elevations from the lower montane forest zone (~2000–2400 m), through the upper montane forest (~2400–2800 m) and subalpine forest (~2800–3300 m) to the alpine tundra (>3300 m) on Niwot Ridge, Colorado....
I look at a graph of the Mauna loa data here, and I see by eye a gentle curve over the period 1960 - 2018 so a mild acceleration over the full period. Is that what you mean Evan? But eye balling the last ten years I dont see an obvious acceleration in this acceleration. I think...